Scroll bar for MALTAB App Designer

A scroll bar with changing width for MALTAB App Designer

The app creates an scroll bar with changing width using Axes and a rectangular ROI (as the scroll bar) in MATLAB app designer.

The app uses WindowButtonDown function in the figure to find if the scroll bar has been clicked. Then the app changes to WindowButtonMotion function in the figure to track the mouse movement. At the end, the apps use WindowButtonUp in the figure to stop the dragging.

There is a parameter in a the app that control the minimum length of the scroll bar which can be changed in the code.